December 26, 1962 marked the first time that Playboy Magazine ever used the phrase “turn-on.” Since then, humans have conceived of a remarkable variety of metaphor and colorful language in an attempt to try and make some sense of copulation. Over at Hazlitt, Chelsea G. Summers takes a close look at the increasingly electric language of sex. Unsurprisingly, sex is never far from the mind of a literary writer, either.